How can you limit the number of images / videos that can be uploaded to a WordPress post

3 comments

1. try this:

   add_filter('wp_handle_upload_prefilter', 'limit_wp_handle_upload_prefilter');
   function yoursite_wp_handle_upload_prefilter($file) {
     // This bit is for the flash uploader
     if ($file['type']=='application/octet-stream' && isset($file['tmp_name'])) {
       $file_size = getimagesize($file['tmp_name']);
       if (isset($file_size['error']) && $file_size['error']!=0) {
         $file['error'] = "Unexpected Error: {$file_size['error']}";
         return $file;
       } else {
         $file['type'] = $file_size['mime'];
       }
     }
     if ($post_id = (isset($_REQUEST['post_id']) ? $_REQUEST['post_id'] : false)) {
       if (count(get_posts("post_type=attachment&post_parent={$post_id}"))>3)
         $file['error'] = "Sorry, you cannot upload more than four (4) image.";
     }
     return $file;
   }
   

   after you paste this in your theme’s functions.php the upload limit should be 4 files total per post.

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2. I have also on solution, use same idea and hooks, only more complex with more functionalities and structured in classes for easy reused. Was an customer project and now its free: https://github.com/bueltge/Limit-Upload

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3. Anyone wishing to use this code, be sure to include the 'posts_per_page' => -1 if you want to limit the number to more than 5 because the get_posts query on this page will only get a max of 5 because of the default paging.

   see https://stackoverflow.com/questions/2134500/why-does-get-posts-return-only-5-matching-posts-when-it-should-return-9 for more information. Cheers!

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